After spending nearly a decade in jail, authorities in Mexico have imprisoned the legendary drug baron Hector “El Guero” Palma, who founded the powerful Sinaloa Cartel with Joaquin “El Chapo Guzman, for two murders.

ABC News cited sources within the U.S. Embassy, who confirmed that U.S. Federal Marshalls secured Palma’s transfer of custody over to Mexican authorities in the border city of Matamoros, located just across from Brownsville, Texas, this week.

As JammedUp previously reported, the Mexican drug lord was released from a federal lockup in Atwater, California on Saturday, June 11th, after serving nine of a 16-year prison sentence. Officials initially said he would be transferred to the Punta Grande Prison in Jalisco.

However, Arely Gomez, the Attorney General in Mexico, said that “El Guero” Palma was flown to Mexico City and instead transported to the Altiplano maximum-security detention center, which is the same prison where “El Chapo” pulled off his daring July 2015 escape.

The AG’s Office said officials executed an arrest order for Palma out of the western state of Nayarit, but provided no further details on the double murder charges.

Many speculated that El Guero Palma would go free after Mexican officials remained uncertain about whether they could to bring new charges against the cartel boss.

Gomez had revealed that her office had recently opened a review to assess whether there were any pending cases for previous crimes against the cartel boss.

“We are in the process of carrying out an exhaustive review, checking all the prosecutors’ offices,” Gomez said.

Mexican Marines captured Palma in June 1995 after a jet that he was traveling in crashed in western Mexico. He was then extradited to the U.S in 2007, where he pled guilty to cocaine trafficking charges and was sentenced to 16 years in prison.

Palma earned early release after a judge granted him credit for time served in Mexico and for good behavior.

Many experts believed that Palma would certainly return to the drug trafficking business if he were allowed to walk free, despite the fact he faces a cartel landscape in Mexico that has drastically changed since both he and “El Chapo” first founded the Sinaloa cartel in the early 1990s.

“He could try to get involved, but I don’t know how directly, Palma may have lost much of his money and his connections since he was arrested following a plane crash,” said Mexico City-based security analyst, Alejandro Hope.

Hope said if Palma were allowed to walk he would likely vanish into Mexico’s backcountry just like Rafael Caro Quintero, the last major old school drug lord.

Caro Quintero hasn’t been seen since his release in 2014 because he is also currently wanted by authorities, given that Quintero participated in the 1985 torture-slaying of U.S. DEA agent Enrique “Kiki” Camarena.

The Mexican government was left red-faced after judicial misconduct secured Quintero’s release.

Law enforcement officials say that Palma’s return could signal another headache for the strife-ridden country.

Palma-Salazar had a track record for beating charges in Mexico. Before he was extradited to the U.S., he only served a little more than two years in prison for a weapons violation. On numerous occasions, he was either acquitted or saw charges dismissed for an array of crimes, which included drug trafficking, kidnapping, multiple counts of murder, and robbery.

Much like his business associate “El Chapo,” Mexico was unable to do a sufficient job of keeping Palma behind bars. He finally fell into the hands of law enforcement after his plane crashed in 1996.

With all the difficulty that Mexico is currently enduring to secure “El Chapo’s” extradition, Palma’s return increases the possibility that one day, Guzman may be allowed to be sent back to Mexico.

A cartoon in the La Jornada newspaper read: “If we extradite narcos to the United States, we should demand they not send them back.”

Mike Vigil, the former head of international operations for the U.S. DEA said: “There are a lot of individuals in Mexico, government officials, that are a little bit perplexed because they feel that if the United States wanted Palma, that he should have remained in prison here for a lot longer time … And then you’re letting him go very quickly.”

He added: “That is their concern, so that is going to throw a little bit of a bar into the extradition process between Mexico and the United States, which has been sporadic at best since the inception since the extradition treaty was signed between the two nations in 1978.”

Vigil believes that Palma will likely cause trouble and more chaos if he is released, saying: “In my opinion based on 13 years in Mexico … Palma’s release will translate to more drugs in the U.S. and more violence for Mexico.”

He noted that Palma is an extraordinarily vicious man and added: “…the only business that ‘El Guero’ Palma understands is the drug trade, he’s an expert when it comes to trafficking and distributing drugs.”

According to reports, Palma’s vicious nature stemmed from when his wife was seduced by a rival drug trafficker from Venezuela named Rafael Clavel, who made her withdraw $7 million from Palma’s bank accounts.

Clavel then beheaded his wife and sent her head to Palma. He would later kidnap Palma’s two children and threw them off of a bridge.